In [1]}, complexity of ML detection is reduced using Sensitive Bits (SB). [2]} proposes a pre-decoder guided local exhaustive search mechanism for V-BLAST [3]}. In [4]} a similar reduction in ML complexity is achieved in M-PSK modulated systems. Complexity reduction for a spatially modulated system is proposed in [5]}. A more generic approach with wide range of applicability is considered in [6]} where performance is traded off with computational complexity. But this approach doesn't address the search algorithm, it rather deals with the complexity reduction of calculation of the cost function (CF). In this work, we try to address the search complexity aspect of ML detection.
